Howlbringer

Enlighten {b}{g} (If you cast this spell for its enlighten
cost, put it over or under target enchantment you own.
They enlighten into the enchantment on top plus all abilities from under it.)
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At the beginning of your upkeep, target
enchantment you control gains deathtouch.
{2}{b}: Howlbringer becomes a 2/3 Black and
Green Wolf creature token until end of turn.